i conver my hdd gpt to mbr and i loss my data?

I tried to install windows that requires mbr system to a gpt system. I converted gpt to mbr using diskpart utility. After it all my logical disks disappeared and only one (with total amount of space) was left. Everything is ok but I need some data from my old disappeared logical disks. Is there a way or is it possible to recover data somehow? Maybe someone had same trouble... Thanks in advance.